Maxim Integrated MAX922CUA Microprocessor Voltage Supervisors

The MAX922CUA is a high-precision, low-power microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides a significant level of system reliability and accuracy required for critical electronic applications. This device is particularly suitable for use in portable equipment, computers, controllers, and intelligent instruments where efficient power management is crucial.

With its compact 8-pin µMAX package, the MAX922CUA offers a dual threshold voltage monitor with a 1.8V detector threshold and a 2.5V detector threshold. This feature allows the device to monitor two supply voltages simultaneously, ensuring that both the core and I/O voltages of a microprocessor are within the acceptable range. The device also includes a manual reset input that provides a straightforward method to initiate a system reset.

The MAX922CUA provides a robust set of features that enhance system stability. It includes a 140ms (min) reset timeout period, which ensures that the system has sufficient time to stabilize before it resumes operation after a reset. Additionally, the device has a low supply current of only 15µA, making it an energy-efficient choice for battery-powered applications.

One of the key benefits of the MAX922CUA is its precision voltage monitoring capability. The device ensures that the monitored voltages do not exceed the tight 1.5% threshold accuracy over the entire temperature range of -40°C to +85°C. This precision is vital for systems that require consistent and reliable operation under varying environmental conditions.

Overall, the Maxim Integrated MAX922CUA is a versatile and reliable voltage supervisor that offers excellent features for monitoring the health of power supplies in microprocessor systems. Its dual voltage monitoring, low power consumption, and high accuracy make it an ideal choice for designers looking to enhance the reliability and performance of their electronic systems.